model_specification objectidentify_subject.Rdidentify_subject is a data descriptor function used to identify a subject identifier variable in the data.
identify_subject(name, group = NULL)The nume of variable in the input data containing the subject identifier.
If there are repeated clusters of observations per subject, group identifies each group of observations. This is needed for data structures where each group may have multiple observations.
A object that can be used by specify_models to add subject_id information
to the data description object.